Clerk vs Auth0 vs WorkOS for B2B SaaS

TL;DR

Clerk, Auth0, and WorkOS solve different stages of the same problem. Clerk is the fastest to implement and best for early-stage SaaS (free up to 10,000 MAU). Auth0 is the enterprise workhorse with 30+ years of battle-testing and every enterprise feature you'll need eventually. WorkOS is the specialist — purpose-built to add enterprise SSO (SAML/OIDC), SCIM provisioning, and audit logs to an existing product. For most boilerplates, the path is: Clerk to launch → WorkOS when enterprise customers demand SSO.

Key Takeaways

• Clerk: best DX, fastest setup, built for Next.js App Router — free to 10K MAU then $0.02/MAU
• Auth0: most feature-complete, best enterprise support, complex pricing — $23/month to start
• WorkOS: not a full auth provider — adds enterprise SSO/SCIM/audit logs on top of existing auth
• Supabase Auth: free, self-contained, best for Supabase-native boilerplates
• Migration difficulty: Clerk → WorkOS is a natural path; Auth0 → anything is painful (vendor lock-in)
• B2B trigger point: when your first enterprise customer asks for SSO, you need WorkOS or Auth0

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The Auth Provider Landscape

Full Auth Providers (replace your auth completely):
  Clerk      — Developer-first, Next.js-optimized
  Auth0      — Enterprise-grade, 30+ years legacy
  Supabase   — Self-contained, free, Postgres-native
  NextAuth   — Open source, self-hosted, most flexible

Enterprise Auth Add-ons (work alongside your auth):
  WorkOS     — SSO + SCIM + Directory Sync + Audit Logs
  Okta       — Enterprise SSO and Identity Management

When to use each:
  Early stage (<10K MAU, B2C-ish)     → Clerk
  Enterprise from day 1               → Auth0 or WorkOS
  Supabase stack                      → Supabase Auth
  Privacy / self-host                 → NextAuth
  Adding SSO to existing product      → WorkOS

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Clerk — The Developer-First Default

Price: Free (10,000 MAU) → $0.02/MAU after, $25/month for organizations Stack support: Next.js, React, Remix, Astro, and more GitHub stars: N/A (closed source) Best for: indie hackers, early-stage B2C and light B2B SaaS

Clerk's key advantage is the tightest Next.js App Router integration of any auth provider:

// Clerk setup in Next.js (Next.js App Router):
// middleware.ts — protect routes:
import { clerkMiddleware, createRouteMatcher } from '@clerk/nextjs/server';

const isProtectedRoute = createRouteMatcher([
  '/dashboard(.*)',
  '/api/protected(.*)',
]);

export default clerkMiddleware(async (auth, req) => {
  if (isProtectedRoute(req)) {
    await auth.protect();
  }
});

export const config = {
  matcher: ['/((?!.*\\..*|_next).*)', '/', '/(api|trpc)(.*)'],
};

// Server components (zero boilerplate):
import { currentUser, auth } from '@clerk/nextjs/server';

export default async function DashboardPage() {
  const user = await currentUser();
  const { userId, orgId, orgRole } = await auth();

  return (
    <div>
      <p>Hello, {user?.firstName}!</p>
      {orgId && <p>Organization: {orgId}</p>}
    </div>
  );
}

// Client components:
import { useUser, useOrganization } from '@clerk/nextjs';

export function UserProfile() {
  const { user, isLoaded } = useUser();
  const { organization } = useOrganization();

  if (!isLoaded) return <div>Loading...</div>;

  return (
    <div>
      <p>{user?.emailAddresses[0]?.emailAddress}</p>
      {organization && <p>Team: {organization.name}</p>}
    </div>
  );
}

Clerk features:

• Email/password, magic links, OAuth (Google, GitHub, Apple, etc.)
• Passkeys (WebAuthn) — passwordless biometric auth
• Organizations and teams (multi-tenancy built-in)
• Role-based access control (RBAC)
• Pre-built UI components (sign-in, sign-up, profile, org management)
• User management dashboard (no-code admin)
• JWT templates (add custom claims for Supabase RLS, Hasura, etc.)
• SSO via SAML/OIDC (Organizations add-on: $25/org/month)

Clerk limitations:

• SSO costs extra ($25/org/month) — can get expensive at scale
• Can't fully self-host (hosted auth pages on accounts.clerk.dev)
• Pricing gets steep at enterprise scale (10K+ organizations)
• Less customizable UI than building your own

Clerk is right for:

• Next.js developers who want auth solved in under an hour
• B2C SaaS with optional team features
• Early B2B SaaS that may not need SSO for years
• Indie hackers and small dev teams

---

Auth0 — The Enterprise Workhorse

Price: Free (7,500 MAU, no organizations) → $23/month Essential → custom enterprise Stack support: Any framework, any language By: Okta (acquired 2021) Best for: teams expecting enterprise customers from day one

Auth0 has the most features of any auth provider but also the steepest learning curve:

// Auth0 with Next.js (App Router):
// app/api/auth/[auth0]/route.ts
import { handleAuth } from '@auth0/nextjs-auth0';

export const GET = handleAuth();

// middleware.ts:
import { withMiddlewareAuthRequired } from '@auth0/nextjs-auth0/edge';

export default withMiddlewareAuthRequired({
  returnTo: '/',
});

export const config = {
  matcher: '/dashboard/:path*',
};

// Server component:
import { getSession } from '@auth0/nextjs-auth0';

export default async function DashboardPage() {
  const session = await getSession();

  if (!session) redirect('/api/auth/login');

  return <Dashboard user={session.user} />;
}

// Client component:
import { useUser } from '@auth0/nextjs-auth0/client';

export function Profile() {
  const { user, error, isLoading } = useUser();

  if (isLoading) return <div>Loading...</div>;
  if (error) return <div>{error.message}</div>;

  return user ? (
    <div>
      <img src={user.picture ?? ''} alt={user.name ?? ''} />
      <h2>{user.name}</h2>
      <p>{user.email}</p>
    </div>
  ) : (
    <a href="/api/auth/login">Login</a>
  );
}

Auth0's enterprise features (the reason it exists):

• Universal Login — customizable hosted login page
• Organizations — multi-tenancy with per-org policies
• Enterprise Connections — SAML, WS-Federation, OIDC, LDAP
• SCIM provisioning — auto-provision users from enterprise IdPs
• MFA — TOTP, SMS, push notifications, WebAuthn
• Attack protection — brute force, breach detection, suspicious IP
• Anomaly detection — ML-based suspicious activity detection
• Fine-grained authorization (FGA) — relationship-based access control
• Log streams — export auth events to your SIEM
• Custom domains — auth.yourdomain.com

Auth0 pricing reality:

Free:    7,500 MAU, 2 social providers, no organizations
Essential: $23/month — still limited (no custom domains, limited enterprise features)
Professional: $240/month — 1,000 organizations included
Enterprise: Custom — SSO, SCIM, SLA, dedicated support

The catch: enterprise features require enterprise pricing. You can't add SAML SSO on the $23/month plan. Many teams start on Auth0, discover they need SSO at scale, and find themselves on $500+/month plans.

Auth0 is right for:

• Teams expecting enterprise sales from day one
• Companies with compliance requirements (SOC2, HIPAA, FedRAMP)
• Multi-language or multi-framework apps (Auth0 has SDKs for everything)
• Teams who need SAML SSO, SCIM, audit logs immediately

Auth0 watch-out: the migration off Auth0 is painful. User passwords are hashed with Auth0's key — you can't export them. Plan your exit strategy before going in.

---

WorkOS — The Enterprise Add-On

Price: Free (1M MAU for SSO) → $125/month for Audit Logs/SCIM By: WorkOS (YC-funded, founded by ex-Stripe Michael Grinich) Best for: adding enterprise features to an existing SaaS product

WorkOS is fundamentally different from Clerk and Auth0. It's not a full auth provider — it handles the enterprise-specific features (SSO, SCIM, Directory Sync, Audit Logs) while you keep your existing auth for regular users.

// WorkOS for SSO — your flow:
// 1. Regular users: still use Clerk/Auth0/Supabase Auth
// 2. Enterprise users: redirect through WorkOS for SSO

// app/api/auth/sso/route.ts
import WorkOS from '@workos-inc/node';

const workos = new WorkOS(process.env.WORKOS_API_KEY!);

// Step 1: Get authorization URL from WorkOS:
export async function GET(req: Request) {
  const { searchParams } = new URL(req.url);
  const organizationId = searchParams.get('org')!;

  const authorizationUrl = workos.sso.getAuthorizationUrl({
    organization: organizationId,
    redirectUri: `${process.env.NEXT_PUBLIC_APP_URL}/api/auth/sso/callback`,
    clientId: process.env.WORKOS_CLIENT_ID!,
  });

  return Response.redirect(authorizationUrl);
}

// Step 2: Handle SSO callback:
// app/api/auth/sso/callback/route.ts
export async function GET(req: Request) {
  const { searchParams } = new URL(req.url);
  const code = searchParams.get('code')!;

  // Exchange code for user profile:
  const { profile } = await workos.sso.getProfileAndToken({
    code,
    clientId: process.env.WORKOS_CLIENT_ID!,
  });

  // profile.email, profile.firstName, profile.organizationId
  // Now create or find user in YOUR database:
  const user = await findOrCreateUser({
    email: profile.email,
    name: `${profile.firstName} ${profile.lastName}`,
    workosProfileId: profile.id,
    organizationId: profile.organizationId,
  });

  // Create your session (your auth system):
  await setSession(user.id);

  return Response.redirect('/dashboard');
}

WorkOS features:

• SSO: SAML 2.0, OIDC — connect to Okta, Azure AD, Google Workspace, OneLogin, etc.
• Directory Sync (SCIM): auto-provision/deprovision users from enterprise IdP
• Admin Portal: no-code portal where enterprise IT admins configure SSO
• Audit Logs: structured log of all user actions (required for enterprise compliance)
• User Management: lightweight user directory (can replace your auth for enterprise)
• Magic Auth: passwordless login via email (alternative to SSO for smaller teams)

The WorkOS Admin Portal — why it matters:

// Generate Admin Portal link for enterprise customer's IT admin:
const { link } = await workos.portal.generateLink({
  organization: 'org_customer_id',
  intent: 'sso',         // or 'dsync' for SCIM
  returnUrl: 'https://app.yourdomain.com/settings/sso',
  defaultReturnUrl: 'https://app.yourdomain.com/settings',
});

// Send this link to the enterprise IT admin.
// They set up SSO without any engineering involvement.
// WorkOS guides them through Okta/Azure AD config step by step.

This is WorkOS's killer feature: enterprise IT admins can configure SSO themselves. No Zoom calls, no back-and-forth — your customer's IT department just follows the wizard.

WorkOS SCIM (auto-provisioning):

// Handle SCIM webhook from WorkOS:
// When enterprise adds user in Okta → WorkOS fires webhook → you create user
export async function POST(req: Request) {
  const event = await req.json();

  switch (event.event) {
    case 'dsync.user.created':
      await db.user.create({
        data: {
          email: event.data.emails[0].value,
          firstName: event.data.name?.givenName,
          lastName: event.data.name?.familyName,
          organizationId: event.data.organizationId,
        },
      });
      break;

    case 'dsync.user.deleted':
      await db.user.update({
        where: { workosUserId: event.data.id },
        data: { deactivatedAt: new Date() },
      });
      break;
  }
}

WorkOS is right for:

• SaaS products adding enterprise sales to an existing B2C/SMB product
• Teams that already have auth (Clerk, Supabase, etc.) and need to add enterprise features
• Products where SSO is a blocker for large deals (common in B2B SaaS)
• Avoiding Auth0's complexity for 90% of users while serving enterprise needs

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Side-by-Side Comparison

Feature	Clerk	Auth0	WorkOS
Type	Full auth	Full auth	Enterprise add-on
Free tier	10,000 MAU	7,500 MAU	1M MAU (SSO)
Paid starts	$0.02/MAU	$23/month	$125/month
Next.js DX	🏆 Best	Good	N/A (add-on)
SSO (SAML/OIDC)	+$25/org/month	Enterprise plan	✅ Included
SCIM provisioning	+$25/org/month	Enterprise plan	✅ Included
Audit logs	❌	Enterprise plan	✅ Included
Admin portal	Limited	Limited	✅ Self-service
Multi-tenancy	✅ Built-in	Add-on	✅ Built-in
Custom domain	✅	Pro+ plan	N/A
Setup time	< 1 hour	2-4 hours	1-2 hours (SSO only)
Migration pain	Low	High	N/A

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The Recommended Path

Stage 1: Pre-launch to first 1,000 users → Clerk — get auth done in an afternoon, free up to 10K MAU

Stage 2: 1,000 to 10,000 users, some B2B customers → Clerk + WorkOS — Clerk for regular auth, WorkOS when first enterprise customer asks for SSO

Stage 3: Enterprise-first from day one → Auth0 — if compliance and enterprise contracts are your primary market from the start

Cost at 5,000 users, 50 organizations:

Clerk:  $25/month (Organizations plan) × 50 orgs = $100-200/month
Auth0:  $240/month (Professional, includes organizations)
WorkOS: $0 for SSO, $125/month if you need Audit Logs

Clerk + WorkOS (most common path):
  Clerk: $50/month (~5,000 MAU)
  WorkOS: $0 (SSO free up to 1M MAU)
  Total: $50/month — much cheaper

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Compare boilerplates by their auth provider integrations at StarterPick.